Advantages of the cavity system slimline modern design that suits the thickness of a standard wall.aluminium sub-frame for side panels and door jambs.compact modular design of motor drive system.latest digital microprocessor controller to gain more exact control of the door operator.provision to interface with building security and fire systems.the main transom housing is hard coated anodized to give smooth operation of the exclusive dual track system.no exposed wiring due to concealed wiring system.ups lithium (uninterrupted power supply) can allow doors to continue to operate under a power failure. This optional extra allows the adis ng operator to work 800 cycles or 28hours after disruption.